FR2915323A1 - Connection for electric connector, has unitary cable shielding device with shielding disk provided with cable passage orifices through which cable is extended, where orifices have clips to lock shielding braid of cable that crosses braid - Google Patents

Abstract

The connection (1) has a unitary cable shielding device with a shielding disk provided with cable passage orifices (11) through which cables are extended. The orifices have clips (13) to lock a shielding braid of a cable that crosses the braid. The device has a locking disk stuck to the disk, where the locking disk has locking orifices (12) coinciding each other with the orifices (11) in a manner that rear end of the clip is housed in the orifices (12). An independent claim is also included for a method for shielding cables.

Description

Connecting device for electrical connector and method of taking over

cable shielding.

  The invention relates to a connector device for an electrical connector. More specifically, the invention relates to a coupling device for individual shielding recovery of a plurality of cables for extending into the electrical connector at the end of which is fixed said connector. The invention also relates to a unitary shielding recovery method of a plurality of cables, said method using a connector for electrical connector according to the invention. An electrical connector connector is generally mounted at the rear of a connector plug or socket to guide cables out of said plug or socket such that the cables are held in the desired direction. Moreover, the connection generally makes it possible to provide an overall external shielding recovery of all the cables extending in said connection. Most often, even if a plurality of cables passes through the connector and the connector, there is a single overall shielding recovery by means of an external shielding braid. However, the external single shielding recovery for a plurality of cables may not always be satisfactory. Some cables used to pass sensitive signals, such as sensor measurements, control signals, etc. require individual shielding in addition to the overall shielding. Such cables may be individual wires, wires grouped by two (pairs), by three (third), or by four (Quad). The associated shields must offer protection to the different groups of cables, this is known as individually shielded wire, armored pair, armored third or armored quad. Also, it is known from document US 6 276 967, a connector for electrical connector for a unitary shielding recovery of each of the cables passing through said connector. For this, the fitting is provided with a conductive material adapter mounted on the front of the fitting. The cables each provided with a shielding braid are arranged in a ring on the outer perimeter of the adapter, so that when the adapter is mounted in the connection, the shielding braids are compressed between the inner wall of the fitting. and the outer wall of the adapter. However, such compression may damage the cables, so it is intended to use additional braided cables to individually protect each of the cables. It is therefore necessary, firstly, to mount each of the cables individually on the adapter, then to protect each of these cables with a braided cable, which makes mounting complex and tedious. Moreover, insofar as all the cables are mounted on the periphery of the adapter, the diameter of said adapter must be sufficient for the cables not to overlap. Depending on the number of cables to be mounted on the adapter, this can quickly be disadvantageous from the point of view of the size of the fitting. In the invention, it is sought to provide a connection device for electrical connector adapted to allow a unitary shielding of a plurality of cables which is simple to use. By unitary shielding recovery is meant by opposition to the overall shielding, a shielding recovery at each of the cable units passing through the connection, said cable units may consist of single cables and / or organized in pairs, thirds and / or quad. In the invention, it is also sought to provide a unitary shielding recovery method of a plurality of simple and fast cables to implement.

  For this, in the invention, using individual shielding recovery means comprising a piece of conductive material of generally circular shape, intended to be housed in the internal volume of the connector, said circular member having cells provided with clips. Each cell is intended to be traversed by at least one cable provided with a shielding braid at least partially external, so that the braided shield is in contact with the clip. The circular part is advantageously provided with at least as many cells as there are cable units intended to pass through the connection, so that each of the cables passing through the connection has a shielding braid enclosed in a clip of the circular piece. The shielding recovery means may also comprise a clip clamping piece arranged downstream of the circular piece provided with clamping clips, to limit the movement of the clips when the cables pass through them and to compress the shielding braids of the cables. cables. By upstream and downstream or front and rear means the connection made in the connector located upstream of the connection considered.

  The unitary shielding recovery means are housed in the internal volume of the coupling. Advantageously, the unitary shielding recovery means are specifically adapted to a given connector, that is to say that they comprise as many clips as there are cable units and that the arrangement and the size of the cells and clips on the unitary shielding recovery means are dependent on the arrangement and size of the cables in the connector. The recovery of unitary shielding can be accompanied in a conventional manner, a recovery of external overall shielding. According to the invention, before fixing the connection on the back of a plug or a base, each cable provided with a braiding shield, at least partially external, is slid inside a cell of the circular piece, and possibly the clamping piece, so that the shielding braid of each of the cables is inserted into a clip. Then crimp the contacts of the plug or the base on each of the cables. The fitting is then screwed onto the rear of the plug or base so as to block the unitary shielding recovery means in the connection in a configuration such that the braids of the cables are clamped and held in the clips. The invention therefore relates to an electrical connector comprising a unitary cable shielding recovery device, characterized in that said unitary cable shielding recovery device comprises a main element provided with cable passage holes through which cables are intended to extend, each cable passage opening being provided with a retaining member adapted to grip a braid shielding a cable passing therethrough. By unitary shielding recovery is meant recovery of shielding of cable units, depending on whether the cables concerned are individualized or organized in pairs, thirds and / or quads. In this case, each of the cables of the cable unit is advantageously provided with a braid, but the shielding recovery is done at the level of all the braids of said cable unit. Advantageously, the main element extends radially in the body of the coupling, that is to say in a vertical plane perpendicular to the longitudinal axis of the coupling.

  The connection according to the invention may also comprise all or some of the following additional features: the unitary cable shielding recovery device comprises a clamping element connected to the main element, the clamping element being provided with clamping each coinciding with a cable passage opening of the main element, so that a rear end of each retaining member is housed in a clamping hole. By joined, it is meant that the rear face of the main element is positioned against the front face of the clamping element. The clamping holes are in the extension of the cable passage holes so that the retaining members projecting from the rear face of the main member each extend through a corresponding clamping orifice. Advantageously, the number of cable openings is equal to the number of clamping holes, but may also be smaller. - The clamping holes have a diameter smaller than the outer diameter of the rear ends of the retainers, so as to maintain said ends housed in said clamping holes in a constrained state. By constrained state is meant that the inner wall of the clamping holes compresses the outer wall of the retainers, so as to reduce their diameter. - A front face of the main element is provided with a ring of indexing teeth extending axially on an outer perimeter of said main element. The indexing teeth extend parallel to the longitudinal axis of the connector so as to cooperate with the indexing tooth ring conventionally located on the rear face of the plug or the base. - The unit of the unitary shielding of cables is mounted in translation in the body of the connector.

  Advantageously, in the case where the cables are organized in pairs, thirds and / or quads, the device according to the invention comprises a ferrule of conducting material intended to grip the shielding braids of the cables of the cable unit. The assembly and ferrule cable unit is then housed in the same retainer.

  The invention also relates to a cable shielding recovery method, characterized in that it comprises the following steps: - passing a rear end of a cable unit provided with at least one shielding braid through an organ protruding from a cable passage opening formed in a main member of a shielding take-up device, so that a portion of the shielding braid of the rear portion of the cable (s) the cable unit is housed in said retaining member; - proceed in the same way with each of the cable units; - pass the rear ends of the cable units and the shielding take-up device through a fitting body, so that the shielding take-up device is housed in the coupling body. According to examples of implementation of the method according to the invention it is possible to provide all or part of the following steps: - passing the rear end of a cable unit passing through a cable passage opening of the main element through a clamping hole provided on a clamping member, such that the rear portion of said cable unit passes through said clamping hole; similarly with each of the cable units, the clamping member being provided with a plurality of clamping apertures each coinciding with a cable passage opening of the main member of the shielding take-up device; joining the main element and the clamping element so that the rear end of each retaining member is housed and clamped in a clamping orifice, increasing the compression of the shielding braid in the retaining member. - introduce a cable unit having at least two cables in a ferrule of conductive material so that said ferrule encloses the shielding braids of the at least two cables, before housing the assembly ferrule and cable unit in a body of retained. -Serting a front end of each of the cables, opposite the rear end, in a contact, after mounting said cables in the shielding recovery device; insert each of the contacts into a connector portion. - screwing the front end of the connector on the rear end of the connector portion, so as to cooperate indexing teeth extending at the periphery of the front face of the main element of the shielding recovery device unitary with the rear end of the connector portion. The invention will be better understood on reading the description which follows and on examining the figures which accompany it. These are presented as an indication and in no way limitative of the invention. The figures represent: FIG. 1: An exploded view of a connection according to an exemplary embodiment of the invention; - Figure 2: A longitudinal sectional representation of a connector according to the invention assembled to a bare base; - Figure 3: A partial representation in longitudinal section of a connector according to the invention traversed by a plurality of individual cables; - Figure 4: A partial representation in longitudinal section of a connection according to the invention through a unit of several cables.

  In Figure 1 is shown a connector 1 according to an exemplary embodiment of the invention. The connector 1 comprises a body 2 in which a main element 3, and a clamping element 4, are intended to extend. More precisely, in the example shown in FIGS. 1, 2 and 3, the main and clamping elements 3 and 4 are respectively formed by a shielding recovery disc 3 and a clamping disk 4, intended to extend radially in the diameter of the coupling body 2 so that an outer contour of the discs 3, 4 follow an internal contour of the coupling body 2. The discs 3,4 are mounted in translation in the body 2 of the connector 1 of so as to be able to abut against a radial abutment 5 (FIGS. 2 and 3) extending radially from the inner wall towards the center of the connecting body 2. The radial abutment 5 can be one-off or continuous, which is that is to say have several abutment elements spaced from one another on an internal perimeter, or be in one piece over an entire internal perimeter of the connecting body 2 1. The radial abutment 5 serves to support the discs 3, 4. The connection 1 according to the invention is also mu nor conventionally a locking ring 6 to be screwed on the rear portion of a plug or a base so as to maintain the connector 1 in position at the rear of the plug or the base.

  The connector 1 may also comprise a guide piece 7 intended to be mounted at the rear of the coupling body 2, so as to guide the cables out of the connector 1. In the example shown in FIG. 7 guides guide the cables leaving the connector 1 to 45 relative to the longitudinal axis A of the connector 1. For this, the guide piece 7 has a bent portion 8 extending at 45 relative to the axis In the same way, the connection 1 may comprise an outer ring 8 intended to extend around an outer wall 9 of the connecting body 2, so as to maintain a main shielding braid on the outer wall 9 of the coupling body 2 to ensure in a conventional manner, an overall external shielding recovery. The unitary shielding recovery device according to the invention more precisely comprises the shielding recovery disk 3 and possibly a clamping disk 4. The shielding recovery disk 3 is disposed at the front of the body of the connection 2 with respect to the 4. The front part of the coupling 1 means the part intended to be screwed on the rear of a plug or a base, the rear part of the coupling 1, opposite to the front part, being provided with the guide piece 7 located at the end of the connection 1.

  The shielding recovery disk 3 is provided with a plurality of cable-passing holes 11, each of these orifices 11 coinciding with a clamping orifice 12 formed on the clamping disk 4. Thus, each of the cable-passing orifices 11 opens into a clamping orifice 12, all of these orifices being through orifices.

  In FIGS. 2 and 3, it can be seen that each of the cable-passing orifices 11 is provided with a retaining member 13, or clip, projecting from the rear face 14 of the shielding recovery disk 3, so as to form an extension of the corresponding cable passage opening 11. The rear face 14 of the shielding recovery disk 3 is contiguous to the front face 15 of the clamping disk 4, so that the projecting clip 13 is housed in the clamping orifice 12. Advantageously, the recovery disk 3 is formed by molding, so as to form a single piece. Of course, it is also possible to make the disk 3 by bringing the retaining members 13 on the rear end of each of the cable orifices 11, or by machining them. The retaining member 13 is for example formed of four fins arranged in a conical ring around the rear end of the cable entry hole 11, so that the largest diameter of the cone is attached to the rear face 14 of the shielding recovery disk 3 and that the smaller diameter is housed in a clamping hole 12 of the clamping disc 4. The diameter of the clamping holes 12 is less than or equal to the diameter of the retaining members 13, in such a way that said retaining members 13, when they are accommodated in the orifices of the clamps 12 of the clamping disc 4, are kept in a constrained state so as to be tightened around the shielding braid 18 of the cable 19 passing through the orifices 11, 12 (FIG. 3). In the case where the retaining member 13 has a conical shape, as shown in Figures 2 and 3, the clamping orifice 12 preferably has a conical shape to follow an outline of the retaining member 13. When a cable 18 provided with a shielding braid 19 at least partially external, is housed in a clip 13, it tends to spread the flexible fins of said clip 13, while the clamping orifice 12 tends to the opposite to maintain tightening the fins of the clip 13. Thus the cable 18, once pulled through the orifices 11 and 12 of the discs 3 and 4 of the connector 1 by a user, is held in position in said discs 3, 4. In the example shown in FIGS. 1, 2 and 3, the shielding recovery disk 3 is furthermore provided with an indexing tooth crown 20 disposed on an outer perimeter of the shielding recovery disk 3, the teeth extending parallel to the longitudinal axis A of the coupling 1 so as to come into contact with s indexing teeth 21 disposed in a ring on a rear end 22 of a base 23 (Figure 2) on which the connector 1 is screwed. Advantageously, the indexing tooth crown 20 is an integral part of the shielding recovery disk 3. Thus, during assembly of the coupling 1 on the rear end 22 of the base 23, the crown 21 of the base 23 compresses the crown of indexing teeth 20 of the shielding recovery disk 3, possibly sliding it in the internal volume V of the coupling body 2, against the radial abutment 5. Thus, when it is desired to carry out a unitary shielding recovery for each of the cables of an electrical connector provided with a connector 1 according to the invention, each of the cables 18 provided with an at least partially external shielding braid 19 is passed through a cable passage opening 11 of the disc of 3. The cable 18 is pulled so as to bring the shielding braid 18 through the retaining member 13. Then the rear end 24 of the cable 18 is passed through the clamping hole 12 of the disk 4. On proceeds in the same manner with each of the cables 18 that it is desired to use, then the shielding and clamping recovery discs 3 are joined together so as to attach the rear face 14 of the shielding recovery disc 3 to the front face 15 of the clamping disc 4 by aligning the orifices 11, 12 so that each retaining member 13 is housed in a clamping orifice 12. Then a front end 25 of each of the cables 18 is crimped onto a contact of the plug or the base before inserting each of the contacts in the plug or socket. This step may otherwise be carried out before the insertion of the cables 18 into the discs 3, 4. Then the screwing ring 6 of the coupling 1 is screwed onto the rear end 22 of the base 23, so that the rear end 22 of the plug or the base is in contact with the crown of indexing teeth 20 of the shielding recovery disk 3. In another embodiment, it is possible to provide only a recovery disk 3, without a clamping disc, inasmuch as the flexible fins of the retaining member 13 have sufficient flexibility to allow the cable 18 to pass as it is pulled through the shielding take-up port 11, while keeping the section of cable encircled once the traction force has ceased. As shown in FIG. 4, preferably, when the cables 18 passing through the connector 1 are organized in pairs, thirds and / or quads, the cable unit 26 is first inserted into a ferrule 28 made of a conducting material such as a metal or a metallized plastic material. It is the outer wall 29 of the ferrule 28, housed in a cable opening 11 and a clamping orifice 12 coinciding, which is in contact with the clip 13. Advantageously, so as to maintain contact between the braids 19 cables 18 of the cable unit 26 and the ferrule 28, a wiring accessory 27, such as a conductive elastic system or a thermally-conductive sleeve, is used to hold the set of braids 19 of the cable. Cable unit 26. The wiring accessory 27 is then housed in the ferrule 28 itself. Then the contacts of the plug or the base are crimped onto each of the cables 18. The connector 1 is then screwed onto the rear of the plug or base so as to block the shielding recovery device in the cable. connection in a configuration such that the ferrules 28 of the cable units 26 are clamped and held in the clips 13.

Claims (11)

  1- connector (1) for electrical connector comprising a unitary cable shielding recovery device (3, 4), characterized in that said unitary cable shielding recovery device comprises a main element (3) provided with cable passage (11) through which cables (18) are intended to extend, each cable passage opening being provided with a retaining member (13) adapted to grip a shielding braid (19) of a cable running through it.   2- connection according to claim 1, characterized in that the unitary cable shielding recovery device comprises a clamping element (4) attached to the main element, the clamping element being provided with clamping orifices (12). ) each coinciding with a cable passage opening of the main element, so that a rear end of each retaining member is housed in a clamping orifice   3- connection according to claim 2, characterized in that the clamping orifices have a diameter less than or equal to the outer diameter of the rear ends of the retaining members, so as to maintain said ends housed in said clamping holes in a constrained state.   4- A coupling according to one of claims 1 to 3, characterized in that the unitary cable shielding recovery device comprises a ferrule of conductive material to be housed in a cable passage hole so as to enclose a plurality of cables passing through said orifice.   5. Fitting according to one of claims 1 to 4, characterized in that a front face of the main element is provided with a ring of indexing teeth (20) extending axially on an outer perimeter of said element main   6. Fitting according to one of claims 2 to 5, characterized in that the device for unitary shielding of cables is mounted in translation in the body of the connector.   7- A method of unitary shielding recovery of a plurality of cables (18), characterized in that it comprises the following steps: - passing a rear end (24) of a cable unit (18) provided with at least one shielding braid (19) through a retaining member (13) projecting from a cable passage opening (11) formed in a main element (3) of a shielding retaining device (3, 4), so that a portion of the shielding braid of the rear portion of the cable (s) of the cable unit is accommodated in said retainer; - proceed in the same way with each of the cable units; - pass the rear ends of the cable units and the shield-taking device through a body (2) of the fitting, so that the shield-taking device is housed in the coupling body.   8- The method of claim 7, characterized in that it comprises the following additional steps: - passing the rear end of a cable unit passing through a cable passage opening of the main element through a hole of clamping (12) provided on a clamping member (4) so that the rear portion of said cable unit passes through said clamping hole; - Proceed similarly with each of the cable units, the clamping element being provided with a plurality of clamping holes each coinciding with a cable passage opening of the main element of the shielding recovery device; - attaching the main element and the clamping element so that the rear end of each retaining member is housed and clamped in a clamping orifice, increasing the compression of the shielding braid in the retaining member .   9- Method according to one of claims 7 to 8, characterized in that it comprises the following additional step: - introduce a cable unit having at least two cables in a ferule of conductive material so that said ferrule encloses the shielding braids of the at least two cables, before housing the assembly ferrule and cable unit in a retaining member.   10- Method according to one of claims 7 to 9, characterized in that it comprises the following additional steps: - crimping a front end (25) of each of the cables, opposite the rear end, in a contact, after having mounted said cables in the shielding recovery device; - insert each of the contacts in a connector part (23).   11- Method according to one of claims 7 to 10, characterized in that it comprises the following additional step: - screw the front end of the connector on the rear end of the connector portion, so as to cooperate with indexing teeth extending at the periphery of the front face of the main element of the unitary shielding take-up device with the rear end (22) of the connector portion.